Typewriting machine



April 3, 1945.

R. DODGE TYPEWRITING MACHINE 4 Sheets-Sheet 1 Filed Nov. 17, 1942 1 VB OR MJZ BY a) ATTORNEY April 1;, 1945.

D. DODGE TYPEWRITING' MACHINE 4 Sheets-Sheet 2 Filed Nov. 17, 1942 2% un @w April 3, 1945. R. D. DODGE TYPEWRITING MACHINE Filed No v. 17, 1942 4 Sheets-SheetK IIP.

ATTORNEY R. D. DODGE TYPEWRITING MACHINE 4 Sheets-Sheet 4 April 3,; 1945.

Filed Nov. 17, 1942 A TTORNEY nominations] key is operated.

Patented Apr. 3, 1945 I TYPEWRITING MACHINE .Ronald D. Dodge, Rochester, N. Y., assignor to International Business Machines Corporation, New York, N. Y., a corporation of New York Application November 17, 1942, Serial No. 465,857-

16 Claims. ((2.191-178) This invention relates to typewriting machines. The principal object or the present invention is to provide an improved denominational tabulating mechanism.

Another object is to provide a denominational tabulating' mechanism which is more suitable for operationby power. r

An object is to provide a denominational tabulatingmechanism which has a simpler means of determining the denominational stopping point of the carriage.

Another object isto provide a denominational tabulating mechanism which eliminates the ne- 'cessity for a series of individual connections from the denominational keys adjacent the keyboard to the denominational counter stop mechanism behind the carriage.

An object is to provide a denominational tabulating mechanism which may be applied to a conventional power operated typewriter or, in

fact, any ty ewriter, whether manually or power a Figqll is a detail view showingthetabular I lever in latched position.

- counterst 1 Fig. 12 is a detail view on a large scale showing the relation '01 the tabular lever to the indexable The present invention has been shown in the drawings as applied to the well known Electrooperated, without any substantial alteration in the typewriter.

An object is to provide a novel denominational selecting mechanism for tabulating mechanisms. Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applyingthat principle.

In the drawings:

Fig. 1' is a vertical section through a power operated typewriting machine embodying the present invention.

Fig. 2 is a rear elevation of the tabulating mechanism,

Fig. 3 is a plan view of the tabulating mechanism.

Fig. 4 is a plan view of the-mechanism associated with the denominational keys.

Fig. 5 is a front view partly in section, of the mechanism shown in Fig. 4.

Fig. 8 is a vertical section on the line j-I in Fig. I is a ing operation of the tabulating detail viewot the means for causkey when a de- Fig. 8 ls-a large scale vertical section of certain parts 01' the tabulating mechanism.

'Flg.;9 is a perspective view of the comment release mechanism. 1

Fig. 10 is a detail view ot-"the latch releasing cam unit. i

- stop setting key as disclosed in matic power operated typewriter,which also is known as the International. This has. been done purely as a convenience in description and it will be understood that the invention may be applied to other forms of power operated typewriters or to manually operated machines with only. minor changes in the design of certain parts.

The reference numeral I0 designates the usual carriage rotatably supporting the platen H- and mounted on the front rail l2 and rear rail It by means of the usual antifriction rollers IS. The rails l2 and I3 are rigidly supported on the base ii of the machine and are spaced apart by braces l6 located atintervals along the rails II, It. The machine isalso provided with a power roller H which rotates continuously in the direction of the arrow when the machine is in use. The carriage is provided with the usual marginal stop rack It on which are mounted marginal stops, the reference numeral It in Fig, 1 designating the usual right hand marginal stop. The

carriage also supports a tabular -stop bar 2|!v on.

which are rotatably mounted the column stops 21-. It is convenient in the present case to show the form of stop bar and tabular stop construction disclosed in Patent No. 2,157,053. Fora reason which be apparent hereinafter, the stop bar 20 has its faces inclined to the horizontal so that when the column stops II are-set to. active position by the usual setting lever 22 the edge Ila (Fig. 8) which usually cooperates with the tabular lever will be inclined slightly from thevertical. .The setting lever 22,- when operated in a clockwise direction (Fig. 1) by means or the usual the above patent, projects any stop 2| with which it may be in cooperation to the position shown in Fig. -8. The

general-shape, modeofmounting, and method of actuation to the one disclosed in Patent No.

1,935,436. This lever 24 is pivotally mounted on a stud 2| (Pig. 2) supported by a U-shapedrrame- The tabular lever II mounted on the rear rail l3.

2 24 formed with the usual short horizontal slot through which'the stud 25 passes to enable the lever 24 to bepushed to the right a limited extent (Figs. 2 and 3). Normally the lever 24 is held in'the left hand position, as in Figs. 2 and 3, by means of a spring 21 which is anchored to the right hand arm of the lever 24 and to a pin carried by the frame 23. The lever 24 is mounted in an open slot formed by two spaced portions of the frame 23 whereby the lever 24 may be rocked counterclockwise (Fig. 3) in a horizontal plane and also is' capable of rocking on the stud 25 in a vertical plane (Fig. 2), as well as being capable of the aforesaid sliding movement. In the present case, only the horizontal pivotal movement and the sliding movement of the lever 24 is involved.

The horizontal movement of tabular lever 24 is effected by mechanism controlled by the tabulating key TK (Fig. 1). This key controls a. cam

on a cross rod 32 and isconnected by a link 33 to a lever 34 (Figs. 2 and 3) pivoted at 35 on one arm of a normally stationary lever 36 supported by the rear rail |3 as in Patent No. 1,935,436. The aforesaid movement of the bell crank causes the upper end of the lever 34 to move rearwardly (Fig. 2) that is, upwardly with reference to Fig. 3. The lever 34 has its upper end engaging the side of lever 24 whereby said lever will be rocked counterclockwise in Fig. 3 whenever the tabulating key is depressed. This causes the left hand end of lever 24 (Figs. 2 and. 3) to move forwardly (Fig. 2) or downwardly (Fig. 3).

Ordinarily a tooth 24a (Figs. 2 and 8), formed in the left hand end of the lever 24, cooperates directly with'the column stops to arrest the carriage in various columnar positions as described in both the patents mentioned above. For the purpose of selectively arresting the carriage in different denominational positions there is interspaced at intervals to correspond with the spacing of the column stops 2|. The. number and spacing of the tooth. spaces in the counter stop member 42 corresponds to the number of denominational keys with which the machine may be provided.

When the tabular ?..ver 24 is rocked horizontally in the manner described above by the cam unit 28, the tooth-24a enters a selected one of the spaces between the teeth 42b, according to the position of the carrier 3l,and rocks the carrier 31 counterclockwise (Fig. 8) to carry the tooth 42a into the path of a set column stop 2|. It is evident that the position in which the carriage is arrested will depend upon how far away from the position of Fig. 3 the carrier 31 is displaced. Fig. 3 shows the carrier in the position designed to arrest the carriage at the decimal point printing position. This is also the position in which the carriage will be arrested if the tabulating key TK alone is depressed. In Fig. 3 the column stops 2| move to the right when the carriage is released during a tabulating operation whereby the nearest stop which is in set position to the left of the tooth 42a will strike said tooth.

When the tabular lever 24 is rocked horizontally, as described above, to thrust the tooth 42a into the path of a column stop, it is held in operated position by a. latch 43 pivoted on a stud 44 carried by the rear rail i3. This latch 43 is urged in a counterclockwise direction (Fig. 3) by torsion spring 43a (Fig. 11) coiled around the stud 44 which spring normally holds the edge 43b against the left hand vertical edge of an extension 24b (Fig. 2) of the tabular lever 24. When the latter is operated the spring 43a operating the latch 43 rocks the latter counterclockwise to the position of Fig. 11. counterclockwise movement of the latch 43 is limited by a stop portion 430 in the latch engaging a lug 45a in a stop plate 45 secured to the rear rail l3 as most clearly shown in Fig. 11.

Means are provided to automatically release in the proper denominational position, which means is controlled by the horizontal sliding posed between the column stops 2| and the tooth 24a indexing mechanism including a counter stop controlled bydenominational keys. This indexing mechanism includes a carrier 31 (Figs. 1, 2,

a, and a) which may takethe form of a sheet metal frame slidably mounted on a, rod 38 extending parallel to the rear rail l3. The rod 38 is supported at one end by a plate 39 secured to one of the braces l6 as best shown in Fig. 1 while the 4 other end of therod is supported by a frame 4|) also secured to the rear rail l3. Normally a spring 4| attached to the lefthand side arm (Fig. 2) of the frame 31 and to the plate 39 holds carrier 31 in its right hand position (Figs. 2

and 3).

This counter stopmember has acounter stop 7 element comprising a tooth 42a formed therein designed to move into the path of the set column stops 2! when the frame 31 is swung forwardly in Fig. 2 (downwardly in Fig. 3 and counterclockwise in Fig. 8). The counter stop member 42, in cooperation with the tabular lever 24, forms an indexing device for the counter stop tooth 42a and for this purpose is provided with teeth 42!) movement permitted the tabular lever 24in consequence of the slotted mounting of said lever on stud 25. Secured to the side of lever 24 (Figs..3 and 8) opposite the counter stop 42 is a frame piece 240 which is connected by a link 46 to an arm 41 secured to a vertical shaft 43 journaled in the frame 40. The lower end of the shaft 43 has an arm 49 connected by a link so to a trip lever 5| (Figs. 1 and 10) pivoted on the cross rod 32. This trip roller controlsa cam unit 52 similar to the cam unit 23. The cam unit 52 is connected by a link 53 to one arm of a. bell crank 54, the other arnrof which is connected by a link 55 to an arm 36 (Figs. 2 and 3) secured to the lower end of a shaft 51' also journaled in the frame 40. 'The' upper end of the shaft 51 is provided with an arm 58 connected by a link 59 to the latch 43.

- When a tabulating movement takes place, one of the set stops 2| will strike the tooth 42a and move the counter stop 42, the carrier 31 and the tabular lever 24 to the right '(Figs. 2 and 3).

This causes the link 46 to be drawn to the right rocking arm 41, shaft 48 and arm 43 clockwise (Fig. 2). This thrusts'the link 50 upwardly in Fig. 3 or to the right in Fig. 1 thereby releasing the cam unit 52 to enable said cam unit to be operated by the power roller H in the usual way. Cam unit 52 rocks clockwise in Fig.10, drawing down the link 33 and rocking bell crank lever purpose there isprovided the usual escapement release lever 60 pivoted on the top of the rear rail l3 (Figs. 1, 2, 3 and 9) and swinging in a horizontal plane. This release lever has 8. lug

-60a engaged by the rear side (the left hand side,

Fig. 1) of tabular lever 24. Lever 60 also has a portion 60b extending in the planes of the escapement pawls 6| (Fig. 9) whereby the .pawls will be released whenever the release lever 60 is actuated clockwise (Fig. 3) by the tabular lever 24. Lever 60 also has a lug 50c engaged by the usual carriage-release bail 62 (Figs. 1 and 8) which is operated by the carriage release levers located on the ends of the carriage Hi.

There are a number of conditions of rebound which must be satisfied in order to insure accurate operation of the tabulating mechanism. When the column stop 2| strikes tooth 42a (Fig. 3) there is a possibility of rebound-of the-column stop 2| to the left (Fig. 3) away from the tooth 42a. This is prevented by a rebound check pawl 63 pivoted on a stud 31a located on a bentover lug formed in the carrier 31. The pawl 63 is actuated in a clockwise direction (Fig. 3) by a torsion spring 64 coiled'around the stud 31a and hooked around the pawl 63.. Clockwise r0,- tation of the pawl'63 by the spring 64 is limited by a lug 63a which extends downwardly into the plane of the lug supporting the stud am.

As the set stop 2| travels to the right toward the tooth 42a. it first engages the lower edge (Fig. 3) of the pawl 63 and rocks it slightly counterclockwise until, at the moment when said stop strikes the tooth 420, the pawl 63 snaps behind the set stop and prevents the carriage from rebounding by trapping the set stop between the pawl 63 andtooth 42a.

There is also a possibility of the tabular lever 24 rebounding when the left hand end of the horizontal slot therein strikes the stud 25 in Fig. 2. In order to prevent this there is provided a second rebound pawl 65 (Fig. 3) pivoted on a stud 66 carried by the rear rail l3. This pawl 65 is located over a fixed-stop lever 61 which is attached to the top of the rear rail l3 by means of the stud 66 and also by a, stud 68. The stop lever 61 is formed with a stop lug 61a in the "plane of the pawl 65 which is held against said stop lug by a torsion spring 69 coiled around the stud 66 and engaging both the edge of the pawl 65 and stud 68 so as to urge said pawl in a counterclockwise direction against lug 61a. When the tabular lever 24 is rocked by the cam unit 28 the extension 24d of frame piece 240 moves downwardlyin Fig. 3 and rocks the pawl 65 clockwise. When the tabular lever '24 is moved horizontally to the right in Fig. 3 by the carriage, the extension 24d moves far enough to the right to clear the end of the pawl 65 which snaps upwardly in Fig. 3 to hold, the tabular lever 24 in its horizontally displaced position. The pawl 55 is of suflicient length so that only a slight clearance space is provided toenable said pawl to clear the extension 24d when the tabular lever'24 has been moved far'enough to engage the left hand end of the slot therein (Fig. 2)

with the stud 25. At the end of this movement of the lever the pawl .65 will be left holding lever 24 in its right hand position while the ratchet 43 will be holding the lever 24 in its horizontally rocked position. As soon as the pawl 65 is released, it reengages the rack 61a. When the latch 43 is released by the operation of the cam escapement pawls from dropping into the proper unit 52, as described above, the end of the pawl 65 prevents restoring movement of the lever 24 to the'left (Fig. 3) until said lever has been restored clockwise (Fig. 3) by spring 2! far enough for the extension 24d to clear the end of the pawl 65. Spring 2! then draws lever 24 leftwardly to the position of Figs. 2 and 3.

The tooth 24a (Figs. 2 and 8) necessarily has a certain amount of backlash when engaging one of the tooth spaces in the counter stop member 42. This backlash will become worse with wear and may permit sufiicient relative movement between tooth 24a and member 42 to prevent the tooth spaces in the escapement rack 10 (Fig. 1). Tins is particularly apt to occur where the mechanism is used on an elite machine or a machine having a. finer pitch escapement rack.

In order to prevent backlash there is provided an elongated spring plate H which is secured to a frame piece 24c fastened to the left hand end (Fig. 3) of the tabular lever 24. The spring plate II comprises a narrow flat strip extending horizontally in Figs. 2 and 3, with the flat side in a vertical plane, and is formed with a bentover tooth Ila shaped somewhat similarly to the tooth 24a as will beapparent from the superimposition of the teeth (Figs. 3. and 12). When the tooth 42a is engaged with the counter stop member 42 the tooth Ila likewise enters a tooth space in said member causing the spring plate H to be flexed slightly in a clockwise direction (Fig. 3).

It will be noted in Fig. 8 that the teeth 42b incounter stop member 42 are cut so that the portions thereof cooperating with the tooth Ila are higher than the portions cooperating with tooth 24a. When tabular lever 24 is operated, tooth Ha enters a tooth space before tooth 42b and not only aligns the member 4.2 with respect to tooth 24a in case member 42 has not been accurately positioned, but also may have a slight tendency to push the member 42 to the left (Fig. 12) forcing the right face of tooth 24a into firm contact with the mating left hand face of the coacting booth 421) on the right. 'In this fashion member '42 and lever 24 are locked tightly together in a definite position determined by the enacting pairs of the teeth 24a, 'lla, 42b to prevent backlash.

The tabular lever is formed with 9. lug. 24

which cooperates with the marginal stops; I 8 (Fig;

1) to define the marginal positlons of the carriage. The frame piece 24a is formed with a bent-' which nose normally engages the side of the carrier. on which the counter stop member 42 is secured. Thus. in the position shown (Figs. 2. 3, and 8), the carrier 41 is free to slide horizon- .tally but cannot freely rock on the support rod 88 as an axis.

When the carrier 31 is rocked counterclockwise (Fig. 8) by the operation of the tabular lever 24, the tooth 24a pushes the side of the counter stop member 42 against the inner face of the lug 24g so that when the counter stop member 42 is locked mum distance, whereas the second key from the slightly away from the counter stop member 82 at first, but the pivotal movement of the carrier 31, effected by the continued movement to the right causes said plate to be moved the minimum distance. The intervening keys cause the plate to be moved proportionate distances, each a different extent from the others.

When each key is depressed, its roller 83 first moves along the inclined surface of its cam 88a associated with such -key until the differential andrebound of the plate 88' with rapid operation of the denominational keys.

left of the tooth 24a, will ultimately result in bringing the counter stop member 4211 back into engagement with the lug 24g whereby any tendency of the tooth 28a to leave the tooth spaces and counter stop member 82 will, result in pressure being applied to the lug Mgby said counter stop member.

The carrier 31 is shifted to the left from the positions of Figs. 2 and 3 different extents under control of differential mechamm which is located just behind and above the keyboard and is shown in Figs. 1 and 4 to .7. Mounted on the front'plate 15 is a pair of brackets 16 supporting a cross rod 11 on which are pivoted the de:

nominational keys 18. The latter extend through slots in plate 15 and are urged in a counterclockwise direction (Figs. 1 and 6) by means ofsprings 18 anchored to the upper edge of the plate 15. The keys may be spaced apart on the rod 11 by means of bushings 88 and are guided on their forward ends by means of key guide plates 8| of which there is one for each key'. Each key guide plate is secured to plate 15 and'has a vertical slot 8Ia through which passes the key 18.

Each key 18 is provided with a pair of antifriction rollers 82, 83 which are rotatably mount' ed on pins 84 carried by bent-over lugs 850. formed in support plates 85 secured to the sides of the keys, the keys 18 being cut away to accommodate the lugs 85a and rollers 82, 88. The rollers.

82 work in the slots 81a of the key guides 81. counterclockwise movement-of the keys 18 is li'mited "by the engagement of said keys with the At its left hand end (Fig. 5) the differential plate 88 has a slot 8611 into which extends a p n 88a on an arm 88 fixed to a shaft 88. The shaft 88 is journaled at its forward end in a bracket 8| carried by a fixed part of the framework and at its rear end in the frame 26 which, it will be recalled, supports the tabular lever 24. Thus horizontal movement of the difierential plate 88 variable extents under the influence of the denoininational keys 18 is communicated to the shaft 88.

In order to space the difierential plate 86 away from the key guide-plates 8| and to retain said plate on the rollers 81, there is provided at each end of plate 86 a pair of guide plates 82 (Figs. 4, 5, and 6) shaped like inverted Ts secured to the rear face of-the plate 15. Spacers 93 separate guide plates 82 from each other and from the plate 18.

Secured to the rear end of the shaft 88 is a hub 85 (Figs. 2 and 3) on which is secured an arm 88 having a pin 88a. Pivoted on a shoulder formed in thehub 85 is a pair of arms 81 having lugs 81a extending on opposite sides of a lever 88 also loosely mounted on the shoulder of hub 85, these parts being retained on the shoulder by a washer I88 (Fig. 2). The pin 88a, as shown in Fig. 2, extends between the two arms 81. A spring l8l, anchored to the lugs 81a, draws the arms 81 effect of the spring in Fig. 2 through a train,

of connections about to be described.

The cams 8811 are of different degrees of inclination tothe horizontal beginning with the steepest. associated with the second key 18 from the right (Fig. 5) and ending with the one having the least slope, associated with the extreme left hand key. There is no cam provided for the extreme right hand key 18 which corresponds to the decimal point position. The extreme left hand key, when depressed, by cooperation with its cam 88a causes the differential plate 88 to be displaced horizontally to the left the maxiinto engagement with the pin 86a in which position the lugs 81a engage the parallel edges of the arm 88. Arm 88 is connected by a link I82 to the left hand side of the carrier 81 (Figs. 2 and 3).

The clockwise rotation of shaft 88 (Fig.5) producedby the variable movement of the difierential plate 88 to the left in Fig. 5 causes counterclockwise rotation (Fig. 2) of the assembly comprising hub 85, the arm 88, arms 81 and 98, and

pressed when the tabular lever 24 and the parts operated thereby, including the carrier 81, are already locked in one of their operated positions which would render the carrier 31 immovable along rod 88. On, the other hand, while the denominational key 18 is being held down by .the operator, the operation of the tabulating mechnism by the carriage results in a movement of the carrier 81 to the right along with the tabular lever 28 as explained above. This, of course, would tend to bend the link I82. In eithercase, however, the assembly on the hub 85 permits the arm 90 to yield in either direction and prevents damage to the parts.

After the plate 86 has been moved the full extent necessary by any key, it is desirable that the cam unit 20 be rendered operative to actuate the tabular lever 24 to cause the tooth 42a on the counter stop member 42 to be projected into the path of a column stop. This is efiected by means of a bail I03 (Figs. 1, 4, and 6) journaled in the brackets I6 and extending underneath all of the keys I8. The bail I03 is provided with an extension I08a (Figs. 1, 5, and '7) overlying a bent-over lug mm on a slide I 04 mounted for vertical movement on the rear face of the plate 15.

The slide I04 is formed with a nose I04b (Figs. 5

and 7) engaging the lever I05 of the tabulating key. The bail I03 is positioned so that it is engaged by a depressed key when the roller 83 for such key is about to ride oil the cam 86a and enter the vertical slot 060 in the differential plate 06. 'By the time the roller 83 reaches the bottom of the slot 860, the cam unit 28 will have been tripped by virtue of the slide I04 pushing down the-key lever I05 of the tabulating key TK. The bail I03 is restored upon release of the denominational key by the usual spring I 00 (Fig. l) for restoring the tabulating key TK. This spring is strong enough to hold the tabulating key lever I05, the slide I04, and the bail I03 in the normal position of Fig. 1.

In Fig. 4, the faces of the keys are inscribed with large numbers to show thedenominational positions corresponding to 1 million with comma keys representing the stoppingpoints oi thecarriage in writing the commas, which ordinarily would be typed to set off every third figure to the left of the decimal point from the next higher denomination. In the actual writing of figures which are to be set off with commas, the comma keys I8 will not be needed since it will never be necessary to print a comma before writing the first significant digit. In machines for normal use in writing financial statements and other records involving amounts in dollars or in writing quantities the comma keys I8 may be omitted.

The extreme right hand key I0 corresponds to the decimal point position and is necessary where numerous quantities involving decimals alone are typed, since the decimal point will always be the'starting point and must always be printed flrstin writing decimals. Conveniently.

this can be the normal stopping point for simple columnar tabulating, that. is where the matter written always begins in the first space on the left of a column several spaces wide, or in writing matter which must be indented. Depression of the decimal key has the same efiect as depressing the tabulating key TK since this key does not move the differential plate 80 but merely operates bail Illitotripkey TK.

It is desirable to make provision for the writ- 1 ing in columnar form of numbers which will not 3 be set off by means of commas. For this purpose the comma keys shown in Fig. 4 preferably should beprovlded in order to realize the full i y of the denominational mechanism. The small numbers 1, 10, 100, and soon up to 100M (Fig.4)

the denominational feature. Denominational tabulators-as used at present on commercial machines require a separate counter stop for eachdenominational position and .an independent train of connections between each counter stop and the corresponding denominational key. Each train of connections usually requires four or five separate parts besides the large and heavy framework for supporting them. These parts,

inthe standard machine, to a very considerable extent interfere with the servicing of the machine since the machines are much less accessible when equipped with the denominational tabulating mechanism on account of the fact that the connections to the denominational keys usually. have to be located on the bottom of the machine and are in-such a position as to obstruct access to other parts of the machine from from the bottom;

Bearing in mind that the machine selected for purposes of illustration customarily is pro vided with the tabular lever 24 in cooperation directly with the column stops, it will be seen that the additional mechanism provided at the rear of the machine consists mainly of only the carrier 31, the indexable counter stop 42, and the connections from such carrier through the single shaft 90 to the keyboard. Since the shaft 00 of-.

fers littleobstruction toevident that access to the is as good in the machine the serviceman, it is disclosed herein as in the standard machine having the simple col; umnar tabulator, it being unnecessary to provide ten sets of link connections from the denominational keys to the rear of the machine. Furthera more, the provision of ten counter stop elements and the necessarily complicated frame with associated parts to support and operate them on the rear of the machine is eliminated.

1 minor repairs.

represent units, tens, hundreds. thousands, tenthousands, millions, ten millions, one .hundred millions, respectively.

One of the advantages of the denominational tabulating mechanism herein disclosed is that relatively few additional parts must be pi'ovided over the ones involved in the usual simple columnar tabulator to enable the attainment of on the frentof themachine, the invention disclosed herein has an advantage in that the entire denominational key mechanism may be removedas a writ by removing the plate I! because of the pin and slot commction between the arm 89 and the plate 80. It isunn to disrupt any operating connections by loosening screws or links 'in order to remove the key mechanism by removing this plate. In removing plate I! from machines equipped with simple tabulators, it is usually merely necessary to remove the stencil and margin release control butdepressed until the carriage has come to rest.

'Usually the denominational counter stops of denominational-:tabtflating mechanisms must be held in the pathof the column by means of the denominationaikey. In the present case.

this is not necessary because, upon the complebe locked in tion ofv the stroke of the denominational key, the mechanism-actuated by the camunit II is operated so rapidly that'the e'olmter stop I! will indexed position by lever ll before machine for servicingdonothavetobeheldthe carriage even starts to move. Consequently erated more rapidly than is usually the case with conventional key-operated denominational tabulating mechanisms.

While there have been shown and described and pointed out'the fundamental novel features of the invention as applied to a single embodiment, it will be understood that various omissions and substitutions and changes in the form' and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims. 7

What is claimed is: e

1. In a machine of the class described, in combination with the carriage, a column stop moved by the carriage, a counter stop movable into the path of the column stop; means to mount said counter stop for movement parallel with the path of movement of the, column stop, said counter stop having a plurality of indexing teeth defining different denominational positions of said counter stop; an operating lever having an indexing tooth relative to which tooth said counter stop element moves, means to operate said lever to project said tooth into cooperation with said indexing teethand to project said counter stop element into the path of the column stop, a series of selective devices representing difl'erent denominational stopping positions of the carriage in a column defined by said column stop, means controlled'by said device for moving the counter stop element relative to said tooth to index said counter stop element to difi'erent denominational-positions, and means controlled by said, devices for operating said lever.

2. In a machine of the class described, in combination with the carriage, a column stop moved by the carriage, a counter stop movable into the path of the column stop and also differentially selectively movable parallel with the path of the column stop to different denominational positions, means to selectively move said stop; a member for movingsaid counter stop into the path of the column stop, said member being movable into engagement with the counter stop in any of its selectively set positions to lock said counter stop in aid position; and means for operating said mem- 3. In a machine of the class described, in combination with the carriage, a column stop moved by the carriage, a counter stop movable into the path of the column stop and also selectively movable parallel with the path of the column stop to any one of a plurality of denominational positions, and an operating member initially movable to en gage said counter stop to lock said counter stopin its denominationally set position and thereafter movable to project said counter stop into the path of the colunm stop.

4. In a machine of the class described, in combination with, the carriage; a column stop carriage and a counter stop, one of said stops movable into the path of'the other stop and also selectively movable parallel with the path of the column stop tions, one of said stops being movable by the carriage; and operating means engageable with said counter stop to lock said counter stop in its denominationally set position and also operative to effect the moving of one stop into the path of the other, and means controlled by movement of the carriage for unlocking said counter stop.

5. In a machine of the class described, in combination with the carriage, a columnstop moved by the carriage, a counter stop projectible into the path of the column stop and also selectively movable parallel of the path of the column stop to any one of a plurality of denominational positions, operating means engageable with said counter stop to lock said counter stop in its denominationally set position and to project said counter stop into the path of the column stop, and a power operating device rendered operative upon engagement of the column stop with the counter stop for releasing 13116106111113 means.

6. In a machine of the class described, in combination with the carriage, a column stop moved by the carriage, a counter stop variably selectively displaceable parallel of the path of movement of the counter stop to different denominational positions, a member movable into engagement with the counter stop to lock said counter stop in its operative position, key controlled means to move said counter stop, and means automatically rendered operative when said counter stop is moved to a denominational position for rendering the locking means effective.

'7. In a machine of the class described, in combination with the carriage, a column stop moved by the carriage, a counter stop variably selectively displaceable parallel of the path of movement of the counter stop to different denominational positions, a member movable into engagement with the counter stop to hold said counter stop in its operative position key controlled means to move said counter stop, means automatically rendered operative when said counter stop is moved to a de-.

nominational position for rendering the holdin means effective, and means rendered operative upon engagement of the column stop with the counter stop for releasing the holding means.

8. In a machine of the class described, in combination with the carriage; a column stop and a counter stop, one movable by the carriage into engagement with the other to arrest the carriage in a columnar position; one of said stops also being initially movable parallel with the path of the carriage to a plurality of difierent positions representing diiierent denominational stopping positions of the carriage, means to retainsaid stop in any of its denominational positions, means for mounting one of said stops for movement a lim-. ited extent upon impact with the other, means to effect the aforesaid movement to different denominational positions including a series of denominational selecting members, and means controlled by said limited movement for releasing the retaining means.

9. In a carriage tabulating mechanism, a column stop and a counter stop, one of which stops is mounted for movement into the path of the other to define a carriage stopping position by-engagement of one stop with the other, one of said stops being selectively movable parallel with said path to difierent denominational positions; a series of denominational keysfor moving said selectively movable stop to said denominational positions, means engageable with said selectively movable stop to lock the selectively movable stop,

in any of its denominational positions, and means rendered operative by the operation of a denominational key to first actuate the locking means to lock said selectively movable stop in the denominational position defined by the operated key and thereafter eiiect the first named movement of said one stop into the path of the other stop.

10. In a carriage tabulating mechanism having a carriage moved stop and a stop which remains fixed while the carriage moves and is oper'ated to arrest the carriage by impact of the carriage moved stop with the fixed stop, one of operation of any denominational key for actuating the locking means at the end of the setting movement 01! the counter stop. 7

11. In a carriage tabulating mechanism having a carriage moved stop and a stop which remains fixed while the carriage moves and arreststhe carriage by impact of the carriage moved stop with the fixed stop, one of'said stops being movable into a path containing the other stop, mans to mount one of said stops for variable selective movement parallel with said path to any one oi a plurality of difierent denominational positions,

with the path of the carriage to different denominational positions, denominational selecting mechanism for variably selectively'inoving the selectively movable stop to said positions, an element engageable with said selectively movable stop to retain it in any of said positions and also operative to place one of said stops in the path of the other as a preliminary to a tabulating movement of the carriage, and means to operate 10 said element to engage it with the selectively movable stop at the end of the variable setting movement-of said variably movable stop.

14. In a carriage tabulating mechanism, a pair of coacting stops, one moved by the carriage and the other remaining fixed during a tabulating movement of the carriage up to the time of an impact between said stops, means to mount one of the stops for variable selective movementparallel with the path of the'carriage to difierent denominational positions, denominational selecting mechanism for variably selectively moving the selectively movable stop to said positions, an element engageable with said selectively movable 1 stop to retain it in any of said positions and also operative to place one of said stops in the path' of the other as a preliminary to a'tabulating movement of the carriage, and means to operate said element at the end of the variable setting .movement of said selectively movable stop, andpower means rendered operative by impact between said stops for releasing said retaining means;

15. In a machine of the class described, in combination with the carriage, a column stop and denominational key mechanism for selectively 5 a counter stop, one of which is moved' by the moving said selectively movable stop to its difi'erent denominational positions, means to lock said 12. In a carriage tabulating mechanism having I a carriage moved stop and a stop which remains fixed while the carriage moves and arrests the 45 same time to project one of said stops into the carriage by impact of the carriage moved stop with the fixed stop, one of said stops being movmovable stop, and a second power means rendered 00 thepath of the other, said operating means ineflective by the impact of saidstops for releasing said locking means. l i

13. In a carriage tabulating mechanism, a pair of coacting stops, one moved by the carriage and carriage during a tabulating run of the carriage, said counter stop being variably selectively settable, in a path parallel with the path of the carriage moved stop, to any one of a plurality of denominational positions; denominational setting means for positioning said counter stop and operating means for said counter stop, including an element engageable with said counter stop to hold it in its denominations-11y set positions and at the path of the other.

- 16. In a machine oi the class described, in comdenominational. positions; denominational set- E ting means for positioning said counter stop; op-

erating means for said counter stop, including an element engageable with said'counter stop tohold it in its denominationallyset positions and at the same time to project one of said stops into eluding a first power device for actuating said element into engagement with thecounter stop: and a second power device rendered operative by impact between saidstops for disengaging said I 66 element. a

I JRONALD'DIDODGE. 

